* {
  margin: 0;
  padding: 0;
  list-style: none;
  text-decoration: none;
}

.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.top {
  flex: 0;
  // border-bottom: solid 1px red;
}

.body {
  flex: 1;
}

.bottom {
  flex: 0;
  // border-top: solid 1px red;
}